1-Methylpiperazine → 6-(4-Methylpiperazin-1-yl)pyridazine-3-carboxamide
Reaction equation
Cl[C:2]1[N:7]=[N:6][C:5]([C:8]([NH2:10])=[O:9])=[CH:4][CH:3]=1.[CH3:11][N:12]1[CH2:17][CH2:16][NH:15][CH2:14][CH2:13]1>CC(O)C>[CH3:11][N:12]1[CH2:17][CH2:16][N:15]([C:2]2[N:7]=[N:6][C:5]([C:8]([NH2:10])=[O:9])=[CH:4][CH:3]=2)[CH2:14][CH2:13]1Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 130 °C
Procedure
6-Chloropyridazine-3-carboxamide (0.315 g, 2 mmol) and 1-methylpiperazine (0.555 ml, 5.00 mmol) were suspended in 2-propanol (2.000 ml) and sealed into a microwave tube. The reaction was heated to 130° C. for 30 mins in the microwave reactor and cooled to ambient temperature. The resulting precipitate was collected by filtration, washed with 2-propanol (10 mL) and dried under vacuum to afford 6-(4-methylpiperazin-1-yl)pyridazine-3-carboxamide (0.333 g, 75%) as a white solid, which was used without further purification. A sample (100 mg) of the crude product was purified by preparative LCMS using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford 6-(4-methylpiperazin-1-yl)pyridazine-3-carboxamide (54 mg) as a white solid.
Workup
- customsealed into a microwave tube
- temperaturecooled to ambient temperature
- filtrationThe resulting precipitate was collected by filtration
- washwashed with 2-propanol (10 mL)
- customdried under vacuum
Sources & evidence
- ORD record
- ord-0489d8d2cba14143aa3b81f712ed2005
- Source dataset
- uspto-grants-2010_06
- Patent number
- US07737149B2
Reaction notes
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